"' Chief Mountain "'( also called "'Old Chief Mountain "') is located in the U . S . state of Montana on the eastern border of rock formations along the Rocky Mountain Front, a long overthrust fault, known as the Lewis Overthrust, which extends from central Montana into southern Alberta, Canada.
42.
"' Chief Mountain "'( also called "'Old Chief Mountain "') is located in the U . S . state of Montana on the eastern border of rock formations along the Rocky Mountain Front, a long overthrust fault, known as the Lewis Overthrust, which extends from central Montana into southern Alberta, Canada.
43.
Although no copper mines have operated in Wyoming in recent years, there are several properties with large-tonnage copper-silver porphyries ( Tertiary ) in the Absaroka Mountains east of Yellowstone, stratabound copper-silver-zinc massive sulfides ( Triassic-Jurassic ) in the Lake Alice district in the overthrust belt of Western Wyoming, several Sierra Madre, a Proterozoic copper-gold porphyry at the Copper King property in the Laramie Range, and other properties of interest ( Hausel, 1997 ).
